Q: What about old versions of Internet Explorer?

Q: Why do I need to use if if there are Bootstrap/Foundation/Etc?

A: I was using Bootstrap for a long time and was pretty happy about it.
But there are some thisng I missed in Bootstrap: support for flexbox, CSS dropdown menu which works on hover and not on click, etc.
Every classname in Flexify is prefixed with [fx-] prefix for avoiding conflicts with other frameworks/libraries.
You may use Flexify with another framework on the same project.

Q: Why Flexbox?

A: Flexbox provides simpler and more flexible layout options in CSS. More specifically, it provides:

Easy vertical alignment of content within a parent element.

Easy reordering of content across devices and screen resolutions with the help of media queries.